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The creators of Spooky Things use pneumatic cylinders, valves, wood, fog machines, light, PVC and electronics to create amazing Halloween yard props. The props rely on Aurdino microcontrollers to provide control and sound effects.
Web site: http://sites.google.com/site/spookythings/Home
Spooky Things
Spooky Things consists of Robert and Eric who became inspired to create pneumatic Halloween projects after reading examples in Make Magazine.
http://sites.google.com/site/spookythings/Home